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Brief Definitive Report

Vaccines and antibody therapeutics targeting staphylococcal surface molecules have failed to achieve clinical efficacy against MRSA infection. Here, Thomer et al. show that the R domain of prothrombin directs fibrinogen to the surface of S. aureus, which generates a protective coat for the pathogen, inhibiting phagocytosis by immune cells. The use of R-specific antibodies allows for immune cell recognition and protects mice against lethal bloodstream infections by broad spectrum MRSA isolates.

Thomas-Claudepierre et al. report that mediator facilitates the long-range contacts between acceptor switch regions and the IgH locus enhancers during class switch recombination and their transcriptional activation.

Nuvolone et al. report a new mouse model to elucidate the functional role of cellular prion protein in physiology and disease.

Mice with a mutated form of RNase H2 found in patients with the neuroinflammatory Aicardi-Goutières Syndrome develop a lethal, cGAS–STING–dependent disease.


Shirai et al. show that the glycolytic enzyme PKM2 serves as a molecular integrator of metabolic dysfunction, oxidative stress and tissue inflammation in macrophages from patients with atherosclerotic coronary artery disease.

Rigoni et al. report that hypomorphic Rag2R229Q mutation is associated with altered microbiota composition and defects in the gut–blood barrier and suggest that intestinal microbes may play a critical role in the distinctive immune dysregulation of Omenn syndrome.

TET2 and TET3 redundantly regulate Foxp3 stability, and their activity can be modulated by vitamin C.

Hu et al. demonstrate that the deubiquitinase Otud7b acts as a positive regulator of TCR-proximal signaling and T cell activation by deubiquitinating Zap70.

Lau et al. show that the FLT3-ITD mutation directly affects dendritic cell development in preleukemic mice, indirectly modulating T cell homeostasis and supporting the expansion of regulatory T cells.

Holmfeldt et al. perform a transplant-based screen to identify regulators of HSPC engraftment and report that Foxa3 is critical for optimal HSC function after transplant.

Misra et al. elucidate the origin of smooth muscle cells involved in supravalvular aortic stenosis and identify the integrin β3 pathway as a therapeutic target in this disease.

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